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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different car >> Section 84 (Hybrid Control System (NI-MH) - Diagnostic Codes (3 Of 5)) >> HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY) >> DTC P0C30-00: Hybrid/EV Battery State of Charge High [01/2019 - 09/2022] >> Procedure

DTC P0C30-00: Hybrid/EV Battery State of Charge High [01/2019 - 09/2022]: Procedure

WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result  Proceed to
      P0C30-00 only is output.  A
      DTCs except P0C30-00 are output.  B
    5. Turn the power switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [01/2019 - 04/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [04/2020 - 09/2022]

    Result: 

    A 

    See step  2

  2. CHECK BATTERY VOLTAGE SENSOR (IGCT VOLTAGE) 

    Refer to PROCEDURE - Step 2

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY VOLTAGE SENSOR POWER SOURCE CIRCUIT) 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - HV BATTERY JUNCTION BLOCK ASSEMBLY) 

    Refer to PROCEDURE - Step 3

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE HYBRID BATTERY THERMISTOR 

    Refer to REMOVAL [01/2019 - 09/2022]

    Result: 

    OK 

    See step  4

  4. CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE) 

    Refer to PROCEDURE - Step 4

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  5

  5. CHECK BATTERY VOLTAGE SENSOR (GIB - GND) 

    Refer to PROCEDURE - Step 5

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [01/2019 - 09/2022]

    Result: 

    OK 

    See step  6

  6. CHECK HYBRID VEHICLE CONTROL ECU (HYBRID BATTERY CURRENT) 
    1. Connect the GTS to the DLC3.
    2. Turn the power switch on (IG).
      NOTE:

      During the inspection, make sure to only turn the power switch on (IG). Do not turn the power switch on (READY).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Hybrid/EV Battery Current, Hybrid/EV Battery Current for Hybrid/EV Battery Control.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Hybrid/EV Battery Current
      Hybrid/EV Battery Current for Hybrid/EV Battery Control
    4. With the power switch on (IG), monitor Data List item "Hybrid/EV Battery Current" and "Hybrid/EV Battery Current for Hybrid/EV Battery Control" for 1 minute.

      Result

      Result  Proceed to
      The value of Data List item "Hybrid/EV Battery Current" and "Hybrid/EV Battery Current for Hybrid/EV Battery Control" is -0.5 A or less or 0.5 A or more. A
      Other than above B
    5. Turn the power switch off.

    Result: 

    A 

    REPLACE BATTERY VOLTAGE SENSOR 

    Refer to REMOVAL [01/2019 - 09/2022]

    Result: 

    B 

    REPLACE HYBRID VEHICLE CONTROL ECU 

    Refer to REMOVAL [01/2019 - 04/2020] , or refer to REMOVAL [04/2020 - 09/2022]

  7. CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE) 

    Refer to PROCEDURE - Step 9

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [01/2019 - 09/2022]

    Result: 

    NG 

    REPLACE BATTERY VOLTAGE SENSOR 

    Refer to REMOVAL [01/2019 - 09/2022]

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